Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1990__68_2_155517, author = {Jussi V\"ais\"al\"a}, title = {Quasisymmetry and {Unions.}}, journal = {Manuscripta mathematica}, pages = {101--112}, publisher = {mathdoc}, volume = {68}, number = {2}, year = {1990}, zbl = {0709.30017}, url = {http://geodesic.mathdoc.fr/item/MM2_1990__68_2_155517/} }
Jussi Väisälä. Quasisymmetry and Unions.. Manuscripta mathematica, Tome 68 (1990) no. 2, pp. 101-112. http://geodesic.mathdoc.fr/item/MM2_1990__68_2_155517/